Rolling-mill.



J. R. GEORGE.

. ROLLING MILL. APPLICATION FILED Aug-17. 19:4.

Patented Apr. 4, 1916.

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O1? WORCESTER, MASSACHUSETTS, ASSIGNOR T MORGAN CON- SACE'USETTS.

ROLLING-MILL.

specification accompanied by drawings,

' in operation to forming part of the same.

My present invention relates to that class of rolling mills, known as continuous, n which several stands of rolls, constituting a train of rolls, are employed for the successive reduction of heated metal, and it has for its objects to enable the number of rolls transfer of the rolled metal from one stand of rolls to another, to render the rolls more accessible, and to enable the finished product from different stands of rolls to be delivered to a single cooling bed. These objects, among others, I accomplish by the novel arrangement of a series of two-high stands of rolls as hereinafter described and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of a rolling mill embodying my present invention. Figs. 2 and 3 are diagrammatic views illustrating the capabilities of my improved mill in varying the reduction of heated metal. Fig. 4 is an elevation of group E.

Similar reference characters refer to similar parts in the difierent figures.

Referring to the drawings, A denotes the delivery opening of a heatingfurnace and B a cooling bed, not shown in detail, but which may be of any known, form of construction. Between A and B; is arranged a train of reducing rolls arranged in successive stands of two-high rolls for the continuous reduction of a heated rod or bar in its passage from the delivery opening of the heating furnace to the cooling bed, said stands of rolls being arranged in a novel grouping, as hereinafter described.

In front of and in alinement with delivery opening A I arrange stands 1, 2, 3 and 4 of two-high rolls for the continuous reduction of the heated metal and constituting the first group 0 comprising, in the present instance, four stands, but the number may be varied if desired. The second group D comprises, in the present instance, two stands 5 and 6 of two-high rolls arranged in proximity to each other for continuous re- Specification of Letters Patent.

Application filed August 17, 1914. Serial No. 857,044.

county of Worcester and be varied, to facilitate the Patented. Apr. 4, 1916.

third group E comprises the two stands 7- and 8 of two-high rolls arranged in axial duction, but spaced from the first group I alinement and at one side of the line of move ment of the heated metal as it is delivered from thestands 5 and 6. The fourth group F comprises the two stands 9 and 10 of twohigh rolls arranged in axial alinement and upon the opposite side of the line of movement ofthe metal as it is delivered from the stands 5 and 6. The fifth group G comprises rolls arranged upon the same side of the line of movement of the metal from the stands 5 and 6 as the stands 9 and 10. The third, fourth and fifth groups, E, F and G, are arranged in staggered relationto each other, as represented in plan view in Fig. 1. The first and second groups, C and D, are conveniently driven from motors 13 and 13, and the third, fourth and fifth groups, E, F and G, are conveniently driven by independent motors 14, 15 and 16.

It will be understood that the usual means,'such as pipes, troughs, floor channels, and the like, will be employed wherever advisable for guiding the heated metal from one stand of rollsto another, such guiding means, being well known in rolling mill the two stands 11 and 12 of two-high practice, are not shown or described in detail.

In the accompanying drawings 17 indicates the central line of travel of the heated to be subjected to a reduction through the passes of all the stands of rolls from 1 to .12 inclusive, the metal is subjected to a reduction of the first and secondgroups and, as it is delivered from the stand of rolls 6, it is conducted by loops 18 and 19 through the stands 7 and 8. As it is delivered from the stand 8, the metal is conducted through a guide 20 and by loops 21 and 22 through the stands 9 and 10. As it is delivered from the stand 10,'it is conducted by loops 23 and 24; through the stands 11 and 12. From the stand 12 the metal is delivered in a line 25 to the cooling bed B, the rolls in the stand 12 becoming the final or finishing rolls.

If desired, the reduction may beaccomplished by the employment of a less number 3 and 4 of group C,

of passes than the twelve enumerated above as, for example, the .metal may be conducted through the stands 1 to 6 and on the broken .line 26 and loops 27 and 22 through the stands 9 and 10. From the stand 10 it is conducted by loops 23 and 25 through the stands 11 and 12 and delivered on the line 25 to the cooling bed B, thereby omitting the stands 7 and 8 and finishing the reduction by the employment of ten passesin'stead of twelve. The reduction may be accomplished also by the employment of ten passes, including the stands 7 and 8, as in the first example, and omitting the stands 11 and 12, as illustrated in Fig. 2, where the course of the metal is indicated by a solid line 28, the rolls in the stand 10 becoming the final or finishing rolls. By omitting the rolls in the stands 7 and 8 and conducting the metal on the broken line 29 and loo 30, Fig. 2, the reduction is accomplished by the employment of eight passes only, the rolls in the stands 7 and 8, 11 and 12 remain-- ing inoperative. If the metal be conducted along the solid line 31, Fig. 3, with the rolls in the stands 1 and 2, group C, rendered inoperative, its reduction will be accomplished by six passes, namely, by the stands 5 and 6 of group D, and 9 and 10 of group F, delivering the metal from the stand 10 to the cooling bed. By, rendering the rolls inoperative in the stands 3 and a of group G, and stands 5and 6 of group D, the reduction will be accomplished by. the employment of four passes only, namely, by the stands 1 and 2 of group C, and the stands 9 and 10 of group F.

Although the operation of rolling is continuous throughout the entire train, the stands 7 to 12 inclusive constitute what is own as an open mill, or one in which the rolls are accessible from opposite sides. The rolls in the first four stands constitute what I term the roughing mill for the initial re duction of the metal, while the rolls in the stands 5 to 12 l/Vhatever the combination orinclusive constitute the finishing mill. number of operative rolls employed, the final reductions are accomplished either by the rolls in the stand 12 in group G of finishing rolls, or by the rolls in the stand 10 in group F of finishing rolls. As the delivery rolls in stands 10 and 12 are in adjacent ends of consecutive groups, the finished product from each may be delivered to the cooling bed B. By placing the groups E, F and G in staggered relation to each other, I secure ample space around the roll housings for the passage of operatives and for the conduct of the rolled metal in loops of generous radii. The rolls in groups C and D and the final pairs of rolls in groups E, F and G are driven in the same direction. The first pair of rolls in each of the groups E.

.F and G are driven in the reverse direction,

" either of the troughs and 34 in the present instance from a single motor through gearing in pinion housings 32, such as are usually employed. I

Each group of rolls in the finishing mill consists of two stands of two-high rolls and the metal being rolled may be conducted from the furnace to a cooling bed, or otherwise disposed of, with all the passes operative, Or with any'two stands of rolls in groups C, D, E or G eliminated or. rendered inoperative, enabling thedimension or character of the finished product tobe changed with every succeeding billet if desired.

The cooling bed B is represented as having two receiving troughs 33 and 34, and the broken lines 35 and 36 indicate diversions ofthe rolled metal between the delivery rolls l0 and 12 and the cooling bed, enabling to be used with each pair of rolls.

The rolls 7 to 12 inclusive constitute a sixstand open finishing mill, fed from the roughingtrain forming group 0 through the guide trough 37 which presents the metal between the'groups E and F of the finishing mill. Either the rolls 10 or 12 may become the final rolls of the finishing mill, delivering guide trough '38 bed B. By driving the first finishing roll in group D from a motor other than that employed in driving the rolls in group I and spacing the rolls in group D from group C, I am able to vary the speed of group D relatively to the speed to group Cand provide for an overfeed, thereby avoiding the liability of stretching the metal between the the metal through the to a common coolingv roughing rolls and the finishing rolls.

1. A rolling mill. comprising a cooling I bed, six stands of finishing rolls, a guide for feeding metal to said rolls, said stands being arranged in pairs on opposite sides of said guide, whereby the number of stands employed may be varied, and a guide to said cooling bed common to two stands of finishing rolls.

2. A rolling mill, comprising a train of roughing rolls and a series of finishing rolls arranged in groups of two stands each, with the first group in alinement with the roughing rolls and with the second and third groups on opposite sides of the line of movement of the metal as delivered by said first group. I

3. A rolling mill, comprising a series of rolls having their passes in alinement, a

stands of rolls on the opposite side of said guide with their rolls running in opposite directions, and a delivery guide leading roughing rolls, a guide to receive the metal from said rolls, a finishing mill having two stands of rolls running in opposite directions on opposite sides of said receiving guide, a guide at the delivery end of the finishing rolls, and two additional stands of finishing rolls adjacent to and at one side of said delivery guide.

6. A rolling mill, comprising a receiving guide, and two trains of rolls each consisting of two pairsof rolls, with one train located on one side of said guide and the other train on the opposite side of said guide.

7. A rolling mill, comprising a series of finishing rolls, a pair of rolls by which metal is fed to said. finishing rolls, said finishing rolls being arranged in groups of two stands each, at the side of but at different distances from the line of movement of the metal, with the rolls of one stand in each group rotating in the same direction as said feed rolls and with the rolls of the other stand rotating in the opposite direction.

8. A rolling mill, comprising a group of rolls with their passes in alinement, a series of stands containing rolls for the? further reduction of the metal, said stands being arranged in pairs with the stands of each pair in axial alinement, and means for rotating the rolls of each successive stand in opposite directions.

9. A rolling mill, comprising a pair of reducing rolls, a stand of rolls at one side of the line of delivery from said reducing rolls, a stand of rolls on the same side of said delivery line but nearer thereto, means for conducting the metal being rolled from said reducing rolls through said first and second stands of rolls, two stands of rolls on the opposite side of said delivery line, and means for conducting the metal through said last named stands.

10. A rolling mill, comprising a group of rolls with their passes in alinement, .a stand of rolls on one side of the line of delivery from said group, a stand of rolls on the opposite side of said line, and a guide crossing said line for conducting the metal from said first stand of rolls to said second stand of rolls.

11. A rolling mill, having a pair of rolls for feeding metal to a finishing mill, a finishing mill comprising two stands of rolls arranged at one side of the delivery line from said feed rolls, two stands on the opposite side of said delivery line, a second pair of stands of rolls on the same side of said delivery line as the last mentioned stands but farther removed therefrom, means for conducting metal by looping through said stands of rolls, and a guide for receiving the finished product from one of the stands of finishing rolls.'

12. A rolling mill, comprising a series of rolls having their passes in alinement, a guide series of rolls, stands of rolls arranged on opposite sides of said guide having rolls running in opposite directions, and a delivery guide leading from one of said stands.

13. A rolling mill, comprising roughing rolls, a guide for receiving the metal from said roughing rolls, pairs of finishing rolls arranged on opposite sides of said guide, and means for transferring the metal from a pair of finishing rolls on one side of said guide to a pair of finishing rolls on the opposite side of said guide.

14. A rolling mill, comprising roughing rolls having their passes in alinement, stands of finishing rolls arranged on opposite sides of the delivery line from said roughing rolls, a ide for receiving the metal from said finis ing rolls, with two stands of said finishing rolls having adjacent lines of delivery, whereby the metal may be conducted to said receiving guide from either of said stands of rolls at will.

- 15. A rolling mill, comprising roughing rolls having their passes in alinement, a series of stands containing pairs of finishing rolls for the further reduction of the metal delivered from said roughing rolls, arranged on opposite sides of the line of delivery from said roughing rolls, means for transferring the metal from the rolls on one side of said line of delivery to the rolls on the opposite side ofsaid line of delivery, a cooling bed, and means for conducting the metal to said cooling bed from either of two stands of said finishing rolls at will.

Dated this fourteenth day of August, 1914.

JEROME R. GEORGE.

for receiving the metal from said 

